Refine copy and terminology in landing 'Batteries included' section

[devinjameson]

Motivation

• Clarify product messaging and improve consistency of terminology in the landing page's "Batteries included" section.
• Make feature descriptions more precise and developer-focused, and rename the effects area to a clearer concept (Commands).

Description

• Edited textual copy in packages/website/src/page/landing.ts within the includedSection to tighten the intro sentence and multiple feature descriptions.
• Reworded routing copy to avoid ambiguous phrasing and emphasize bidirectional parsing/building.
• Updated UI Components, Virtual DOM, Subscriptions, and Field Validation descriptions to be more concrete and consistent.
• Renamed the "Side Effect Management" feature label to Commands and replaced its description to describe Effects returning Messages and usual combinators like retry/timeout/race/parallel.

Testing

• No automated tests were run for this change.

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Codex Task

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
foldkit-website	Ignored		Mar 2, 2026 4:46pm